Plato, Laws 832a

ἱεροσύλους καὶ πολεμικοὺς καὶ τυραννικοὺς ποιοῦσα, καὶ μάλʼ ἐνίοτε οὐκ ἀφυεῖς ὄντας, δυστυχοῦντάς γε μήν. πῶς λέγεις; πῶς μὲν οὖν αὐτοὺς οὐ λέγοιμʼ ἂν τὸ παράπαν δυστυχεῖς, οἷς γε ἀνάγκη διὰ βίου πεινῶσιν τὴν ψυχὴν ἀεὶ τὴν αὑτῶν διεξελθεῖν; αὕτη μὲν τοίνυν μία· τὴν δὲ δὴ δευτέραν αἰτίαν τίνα λέγεις, ὦ ξένε; καλῶς ὑπέμνησας. αὕτη μὲν δή, φῂς σύ, μία, ἡ διὰ βίου ἄπληστος

and despots,—and that though, in some cases, they are not ill-natured, but merely ill-fortuned. How so? Well, how could I describe otherwise than as utterly unfortunate men who are compelled to go through life with hunger always in their own souls? This, then, is one cause: what is the second cause you speak of, Stranger? You are right in reminding me. One cause, as you assert, is this lifelong insatiable pursuit, which wholly engrosses each man, and hinders each and all from rightly practicing military operations.